"About the Foundation." Web. <http://www.aldoleopold.org/About/foundation.shtml>.
The Leopold Center Green Building. 2011. Wisconsin.
Trails Aldo Leopold. 2011. Wisconsin.
http://www.youtube.com/watch?v=abiZ3VZ9xxQ Arizona GameAndFish May 24, 2012
"Wilderness.net - Aldo Leopold." Wilderness.net. 16 Aug. 2011. Web. 13 Nov. 2014. <http://www.wilderness.net/NWPS/Leopold>. 
All pictures courtesy of http://www.aldoleopold.org/